On roughness indices for fractional fields
Benassi, Albert ; Cohen, Serge ; Istas, Jacques
Bernoulli, Tome 10 (2004) no. 2, p. 357-373 / Harvested from Project Euclid
The class of moving-average fractional Lévy motions (MAFLMs), which are fields parameterized by a d-dimensional space, is introduced. MAFLMs are defined by a moving-average fractional integration of order H of a random Lévy measure with finite moments. MAFLMs are centred d-dimensional motions with stationary increments, and have the same covariance function as fractional Brownian motions. They have H-d/2 Hölder-continuous sample paths. When the Lévy measure is the truncated random stable measure of index α, MAFLMs are locally self-similar with index \widetilde{H} =H -d/2+d/ α. This shows that in a non-Gaussian setting these indices (local self-similarity, variance of the increments, Hölder continuity) may be different. Moreover, we can establish a multiscale behaviour of some of these fields. All the indices of such MAFLMs are identified for the truncated random stable measure.
Publié le : 2004-04-14
Classification:  identification,  local asymptotic self-similarity,  second-order fields,  stable fields
@article{1082380223,
     author = {Benassi, Albert and Cohen, Serge and Istas, Jacques},
     title = {On roughness indices for fractional fields},
     journal = {Bernoulli},
     volume = {10},
     number = {2},
     year = {2004},
     pages = { 357-373},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1082380223}
}
Benassi, Albert; Cohen, Serge; Istas, Jacques. On roughness indices for fractional fields. Bernoulli, Tome 10 (2004) no. 2, pp.  357-373. http://gdmltest.u-ga.fr/item/1082380223/